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Analog Devices Inc./Maxim Integrated MAX20029BATIB/V+T
- Part No.:
- MAX20029BATIB/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20029BATIB/V+T.pdf
- Description:
- IC REG BUCK ADJ 3A QUAD 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,141
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Product details
Overview
MAX20029BATIB/V+T from Analog Devices is an automotive-grade quad-output power-management IC (PMIC) integrating four synchronous step-down DC-DC converters with factory-programmed output voltages of 1.0V, -, 1.8V, and 1.5V. It delivers up to 3A on Channel 1 and 1.5A on Channels 3–4, operates from 3.0V to 5.5V input, and features 2.2MHz fixed-frequency PWM switching for compact all-ceramic designs. It is used in automotive ADAS domain controllers requiring tightly regulated, low-noise multi-rail power.
For engineers reviewing the MAX20029BATIB/V+T datasheet, MAX20029BATIB/V+T pinout, MAX20029BATIB/V+T application, or MAX20029BATIB/V+T equivalent, key selection criteria include its 3A + dual-1.5A channel configuration, spread-spectrum EMI reduction, -40°C to +125°C operation, SYNC input for external clock synchronization, and factory-set PG timeout of 20,480 cycles.
Technical Context
The MAX20029BATIB/V+T implements peak current-mode control with internal slope compensation and loop compensation, eliminating external compensation components. Its hybrid load-line architecture reduces required output capacitance while maintaining fast load-transient response (±1.5% deviation over 4µs).
It integrates pMOS and nMOS switches with on-resistances of 125mΩ/100mΩ (typ), enabling high efficiency at heavy loads. Two buck channels (OUT3/OUT4) operate 180° out-of-phase to minimize input ripple and reduce effective input capacitance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct connection to automotive battery rail after pre-regulation or LDO. |
| Switching Frequency | 2.2MHz ±10% - enables use of small 1.0µH/1.5µH inductors and all-ceramic output capacitors. |
| Output Current Capability | Channel 1: 3A; Channels 3 & 4: 1.5A each - supports high-current SoC cores and I/O rails simultaneously. |
| Output Voltage Accuracy | ±3% over load, line, and temperature - ensures reliable logic-level compliance without post-regulation trimming. |
| Thermal Shutdown Threshold | +185°C with 15°C hysteresis - protects against sustained overload in under-hood environments. |
| Spread-Spectrum Enable | +3% frequency deviation at 1.5kHz modulation - reduces peak radiated emissions in AM band-sensitive automotive zones. |
| Power-Good Timeout | 20,480 switching cycles (~9.3ms at 2.2MHz) - provides robust sequencing margin for multi-rail systems. |
Pinout & Package
MAX20029BATIB/V+T is housed in a 28-pin TQFN-EP package (5mm × 5mm × 0.8mm) with exposed thermal pad, rated for -40°C to +125°C operation. The exposed pad must be soldered to a PCB ground plane via thermal vias for optimal thermal performance (θJC = 3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 | Active-high enable for Buck 1 | Starts 3A channel; tied high or controlled by system sequencer for power-up coordination. |
| LX1 | Switching node for Buck 1 | Connects to 1.0µH inductor; requires low-inductance layout to minimize switching losses and EMI. |
| PGND1 | Power ground return for Buck 1 | Must be routed separately from analog ground to avoid noise coupling into feedback paths. |
| OUTS1 | Voltage sense input for Buck 1 | Connected directly to VOUT1; sets 1.0V output via internal 1.0V reference (no external resistor needed). |
| PG3, PG4 | Open-drain power-good outputs | Assert high when respective outputs are within ±6% regulation; require 10kΩ pull-up to VA. |
| SYNC | External clock synchronization input | Accepts 1.7MHz–2.5MHz CMOS clock; disables internal oscillator when driven. |
| VA | Analog supply rail | Powers internal reference and control circuitry; must be decoupled with ≥1µF ceramic capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Quad synchronous buck architecture | Four integrated FETs eliminate discrete MOSFETs and gate drivers, reducing BOM count and board area by >40% vs. discrete solutions. |
| Factory-programmed output voltages | 1.0V (CH1), - (CH2 disabled), 1.8V (CH3), 1.5V (CH4) - eliminates need for precision feedback resistors and saves layout space. |
| 180° phase interleaving (CH3/CH4) | Halves input ripple current magnitude, allowing smaller input bulk capacitance and easing EMI filter design. |
| Individual EN and PG signals per channel | Enables flexible power sequencing (e.g., core before I/O) and independent fault detection without external logic. |
| Integrated current-limit and thermal protection | Cycle-by-cycle current limiting and +185°C shutdown prevent damage during short-circuit or thermal overload events. |
Applications
| ADAS Domain Controller Power | Automotive Infotainment SoC Supply |
|---|---|
Use Scenario: Powers vision processor, radar MCU, and interface peripherals in centralized ADAS ECU with strict EMI limits. IC Role / Device Role / Timing Role: Primary multi-rail PMIC delivering 1.0V core, 1.8V memory, and 1.5V I/O rails with synchronized startup and independent PG monitoring. Use Value: Spread-spectrum mode and 180° phasing reduce conducted/radiated emissions below CISPR-25 Class 5 limits without added filtering. |
Use Scenario: Supplies application processor, GPU, and display interface in head-unit with dynamic load profiles. IC Role / Device Role / Timing Role: Quad-buck regulator providing sequenced 1.0V (CPU), 1.8V (DDR), and 1.5V (LVDS) rails with soft-start to limit inrush. Use Value: Factory-set 20,480-cycle PG timeout ensures stable boot before firmware initiates peripheral initialization. |
| Automotive Telematics Gateway | Body Control Module (BCM) Subsystem |
Use Scenario: Powers cellular modem, GNSS receiver, and CAN transceivers in telematics control unit operating across wide temperature range. IC Role / Device Role / Timing Role: High-efficiency PMIC supplying 1.0V modem core, 1.8V GNSS RF, and 1.5V CAN interface with UVLO/ovp protection. Use Value: -40°C to +125°C rating and input OV/UVLO (5.8V/2.77V thresholds) ensure reliable operation during cold cranking and load dump. |
Use Scenario: Delivers regulated rails to microcontroller, LIN transceiver, and sensor interfaces in under-hood BCM. IC Role / Device Role / Timing Role: Compact quad-buck solution replacing multiple discrete regulators to meet space-constrained housing requirements. Use Value: 28-pin TQFN-EP package with exposed pad achieves <3°C/W junction-to-case thermal resistance, enabling 2.285W dissipation at +70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-step-down PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20029BATIC/V+ | Same 3A+1.5A+1.5A channel config but factory-set to 1.1V/-/1.8V/1.0V outputs and 256-cycle PG timeout. | Shorter PG timeout suits faster-booting modules; different voltage setpoints require redesign of downstream logic level compatibility. | Select when 1.1V core rail and rapid sequencing are prioritized over 1.0V/1.5V combination. |
| TPS65321A-Q1 | Triple 3A/3A/3A buck with integrated LDOs; no spread-spectrum; 2.1MHz switching; different pinout and enable logic (active-low). | Higher per-channel current but lacks CH3/CH4 phase interleaving; requires external sequencing IC for multi-rail coordination. | Choose for applications needing three equal high-current rails and integrated LDOs, accepting larger footprint and higher EMI filtering cost. |
Compared with MAX20029BATIB/V+T, MAX20029BATIC/V+ offers faster power-good assertion but mismatched output voltages, while TPS65321A-Q1 trades EMI optimization and compact sequencing for higher per-rail current and LDO integration - making MAX20029BATIB/V+T optimal for space- and emission-constrained ADAS subsystems.
Availability
MAX20029BATIB/V+T is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment SoC power delivery, and telematics gateway subsystems requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MAX20029BATIB/V+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, and communications markets with precision power, sensing, and connectivity solutions.
The MAX20029 family is part of Analog Devices' automotive power-management portfolio, designed specifically for demanding point-of-load regulation in ADAS, infotainment, and body electronics where EMI, thermal, and reliability constraints dominate.
FAQ
What output voltage configuration does the MAX20029BATIB/V+T provide?
The MAX20029BATIB/V+T has factory-programmed output voltages of 1.0V on Channel 1, no output on Channel 2 (disabled), 1.8V on Channel 3, and 1.5V on Channel 4. These values are set internally using trim bits, eliminating the need for external feedback resistors and ensuring ±3% accuracy across temperature and load.
Does the MAX20029BATIB/V+T support external clock synchronization?
Yes, the MAX20029BATIB/V+T includes a dedicated SYNC pin that accepts an external clock signal between 1.7MHz and 2.5MHz. When driven, it disables the internal 2.2MHz oscillator and synchronizes all four buck converters to the external source, enabling deterministic timing in multi-PMIC systems.
How is thermal management handled in the MAX20029BATIB/V+T package?
The MAX20029BATIB/V+T uses a 28-pin TQFN-EP package with an exposed thermal pad. For effective heat dissipation, the pad must be soldered to a large PCB ground plane using ≥6 thermal vias. This achieves a junction-to-case thermal resistance of 3°C/W, supporting up to 2285mW continuous power dissipation at +70°C ambient.
What protection features are integrated into the MAX20029BATIB/V+T?
The MAX20029BATIB/V+T integrates input overvoltage protection (trip at 5.8V), undervoltage lockout (2.77V falling), cycle-by-cycle current limiting, and thermal shutdown at +185°C with 15°C hysteresis. Each buck channel also has independent soft-start and power-good monitoring with factory-set timeout.
Can the MAX20029BATIB/V+T be used in non-automotive applications?
While qualified for -40°C to +125°C automotive operation and AEC-Q100 stress-tested, the MAX20029BATIB/V+T's electrical specifications (3.0V–5.5V input, 2.2MHz switching, quad-buck topology) make it suitable for industrial and medical systems requiring high-reliability, low-EMI multi-rail power - provided system-level qualification aligns with end-equipment requirements.
MAX20029BATIB/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 4V
- Current - Output:
- 3A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (5x5)
MAX20029BATIB/V+T FAQ
1.How can I place an order for MAX20029BATIB/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20029BATIB/V+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX20029BATIB/V+T reliable?
The price and inventory of MAX20029BATIB/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20029BATIB/V+T is usually 5 days.
3.What payment methods are accepted for MAX20029BATIB/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20029BATIB/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20029BATIB/V+T?
MAX20029BATIB/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20029BATIB/V+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX20029BATIB/V+T?
For technical support, including MAX20029BATIB/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20029BATIB/V+T requirements.
6.How does Aetrix verify that MAX20029BATIB/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20029BATIB/V+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX20029BATIB/V+T meets industry standards.
7.What is the process for return or replacement of MAX20029BATIB/V+T?
All MAX20029BATIB/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20029BATIB/V+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX20029BATIB/V+T part is unused and in its original packaging.
Return procedure for MAX20029BATIB/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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